I'm just going to come out and say it: the human body is made up of a lot of elements. In fact, you have about 60 different elements in your body.
That's a lot of tiny little molecules that are responsible for everything from your ability to digest food to your ability to make new cells! So let's take a closer look at these elements and see how they're put together.
Protein
One of the most important elements in our body is protein. Protein is the main building block for our body and it is needed for growth, repair and maintenance of body tissues. It also helps with the proper functioning of the immune system, production of hormones, enzymes, and antibodies (which are proteins).
Water
Water is the most abundant element in the body, comprising approximately 45% of a person's mass. It's a solvent, providing the medium for chemical reactions. Water also acts as a lubricant and shock absorber, which helps you to avoid injury when you run or jump around.
Water is essential for life: your body loses water every day through sweat and urine, so it must be replaced if you want to stay alive! The cells in your body need water so they can function properly; without enough liquid inside them, they start to dry out and eventually die from dehydration. Water helps regulate body temperature too -- when someone gets too hot or cold (which happens quite often), their internal thermostat sends signals telling them how much fluid they should drink so that balance can be restored again.
Skeletal muscle
Skeletal muscle is a type of striated muscle tissue. It's attached to bones by tendons, and it contracts to move bones. You can think of skeletal muscles as the engines that power your body—they make you able to walk around, dance, play sports and do anything else requiring movement!
Skeletal muscles are controlled by motor neurons in the spinal cord or brainstem that send signals down their axons (the part of a nerve cell that carries electrical impulses). When they arrive at their target muscle fibers, these axons release acetylcholine vesicles (tiny sacs containing chemicals) into synapses (the small spaces between neurons). The acetylcholine then binds to receptors on sarcolemma (a cell membrane found around skeletal muscle fibers) which causes calcium ions to flow into the cell, triggering muscular contraction.
Body Fat
Fat is a type of tissue. It is stored energy that can be used by your body when you're hungry or need to generate heat. Fat is found under the skin and around organs, such as the heart and liver. Fat does not have muscles or bones like other tissues do, but it does have nerves! Fat isn't a nerve or blood cell either—it's just another type of tissue known as adipose (or “fatty”) tissue.
So that’s what makes up the human body. The most important thing to remember is that we are made up of many different elements, but each one plays an important role in keeping us alive and healthy. Now go be amazing!
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